Small brewing equipment
In regards to the filter, I know that there are some small wine filters that homebrew suppliers carry that would meet your needs, check beer, beer, and more beer, and northern brewer.
For other used equipment, you are looking for pilot type stuff and I have occasionally seen listings on probrewer for used pilot brewing systems. Sorry I couldn't be more specific, but those are the first places that I would look.
Asking someone their favorite beer style is like asking a parent to choose their favorite child, some will do it but what does it say of their character?